New Check: Amazon OpenSearch Service Reserved Instance Optimization

[brittandeyoung]

Summary

Checks your usage of Amazon OpenSearch Service and provides recommendations on purchase of Reserved Instances.

Motivation

This allows us to recommend the number of each type of Reserved Instance to purchase to maximize your savings.

Additional context

https://docs.aws.amazon.com/awssupport/latest/user/cost-optimization-checks.html#amazon-opensearch-reserved-instance-optimization